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Old 10-12-2013, 12:28 PM   #1
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Supply Line question


Is there any restriction on using 90 degree elbows in a 3/4 inch copper supply line to get under a beam or joist to continue a run? I'm in Oregon

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Old 10-12-2013, 01:38 PM   #2
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None I know of.

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Old 10-12-2013, 02:13 PM   #3
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Supply Line question


Why not drill a hole and go through it?
Main reasons are it would reduce the restriction in the lines and if at some point someone was to finish that area it would be one less thing to have to work around.
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Old 10-13-2013, 07:00 AM   #4
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Supply Line question


You can use wide sweep ells if need be.
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Old 10-13-2013, 08:42 AM   #5
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Originally Posted by COLDIRON
You can use wide sweep ells if need be.
Long sweep ells are only used in refrigeration piping. You should be fine with a standard 3/4" ells.
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Old 10-13-2013, 09:01 AM   #6
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Long sweep ells are only used in refrigeration piping. You should be fine with a standard 3/4" ells.

Wide sweep ells are used primarily in HVAC but you can use them in plumbing if you need to decreased friction and limit pressure drop. You just have to size them correct because HVAC copper is sized different than plumbing copper.

I used to install computer room air handlers that used Glycol cooling coils , the specifications stated that wide sweep ells shall be used to limit pressure drop.
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Old 10-13-2013, 09:11 AM   #7
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Supply Line question


By the way I am not saying he'll have a problem with 3/4 ell I am just giving him an option if he thinks there will be a problem. We actually don't know how many 90 ells are in the system. But as posted don't sound like a problem. I probably would have drilled a hole right through the joist as Joe recommended if possible.

Many diyers don't know there are wide sweep ells.
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Old 10-14-2013, 01:03 PM   #8
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Supply Line question


Thanks for the replies. Yeah, I didn't know wide sweep L's were an option. I suppose I can drill as well as long as I'm not in the middle third of the joists. Was trying to avoid that if possible
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Old 10-14-2013, 03:50 PM   #9
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Thanks for the replies. Yeah, I didn't know wide sweep L's were an option. I suppose I can drill as well as long as I'm not in the middle third of the joists. Was trying to avoid that if possible
regular 90s long sweep 90s both ok I doubt if you would loose much pressure or volume to cause any major problems...ben sr

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